Physics of Scientific Instruments
Physics of Scientific Instruments
Spring 2002
SYLLABUS
INSTRUCTORS:
Chris Frederickson
Brian Tonner
WEB PAGE:
TEXTBOOKS:
Learning with Labview, Robert Bishop, Addison-Wesley 1999.
“Advanced Labview Interfacing”
Python CD-ROM and Introduction to Python (to be determined)
OBJECTIVES:
The purpose of this course is to introduce the student to modern methods of data acquisition and control of experimental systems in the laboratory. These methods are valuable for many environments, from advanced research laboratories to factory automation. The course is structured around two main approaches. In the first approach, a graphical programming language, called “g” or Labview, will be used for interfacing to a variety of external systems and probes. In the second approach, a modern object-oriented programming language called “Python” will be used with similar objectives. Each of the two approaches, graphical and object-oriented, have advantages and disadvantages, some of which are obvious, but many are quite subtle. Through active design and implementation of projects, the student will be able to make decisions about the best approach for a particular problem.
EVALUATIONS:
The student will demonstrate a series of skills and accomplishments for each section of the course (g and Python). Skills will include creation of virtual instruments, use of controls, interfacing through GPIB and DAQ modules, data acquisition, storage and retrieval, and data processing. There will be a series of assigned weekly exercises, which are required. In addition, there will be two “challenge projects”, one using Labview, and the other using Python. These projects will use the comprehensive set of skills learned in each course segment, and will be individualized for each student. The grade assignment will be based on the following components:
|Classroom participation, teamwork, attendance, creativity, |10% |
|persistence and skills | |
|Exercises |40% |
|Challenge Project-Labview |25% |
|Challenge Project-Python |25% |
CLASS SCHEDULE
|LABVIEW SECTION | |
|Jan 7 |LWL Chap 1 & 2 |
|Jan 14 |LWL Chap 3 & 4 |
|Jan 21 |LWL Chap 5 & 6 |
|Jan 28 |LWL Chap 8 & 9 |
|Feb 4 |LWL Chap 10 |
|Feb 11 |LWL Chap 11 |
|Feb 18 |LABVIEW CHALLENGE PROJECT |
|PYTHON SECTION | |
|Feb 25 |Python syntax, use of the IDLE |
|March 4 |Functions and Classes |
|March 11 |SPRING BREAK |
|March 18 |GUI’s |
|March 25 |Interfacing to the serial port |
|April 1 |Interfacing to the parallel port |
|April 8 |Interfacing to a digital i/o port |
|April 15 |PYTHON CHALLENGE PROJECT |
|April 22 |FINALS WEEK: INCOMPLETES AND MAKE-UPS |
EXERCISE ASSIGNMENTS
|LABVIEW SECTION | |
|Jan 7 (Due 1/18) |LWL-E1.1; E1.2; P1.2; P1.3 (nothing to hand in) |
| |LWL-E2.2; P2.2; P2.3 (store your VI solutions in your folder) |
| |PVI-1: “Random Number Generator” |
|Jan 14 (Due 1/25) |PVI-2:“Signal Generator” |
| |PVI-3: Temperature probe VI |
| |LWL-E3.1, E3.2, E3.3, P3.1, P3.3 |
| |LWL-E4.1, E4.2, P4.1, P4.2 |
| |A.L.L.-Chapter 3 & 4 |
|Jan 21 (Due 2/1) |LWL – Chapter 5 (Skip Matlab part): E5.1, E5.2, P5.2, P5.3, P5.5 |
| |Chapter 6: E6.1 (Show Error -> Find), E6.3, E6.4, E6.5, P6.2, P6.4; |
| |ALL – Chapters 5 – 7; |
| |PVI 4. |
|Jan 28 (Due 2/8) |LWL – Chapter 8 (skip sec. 8.7): E8.1, E8.2 |
| |(Data Acquisition (DAQ) >> |
| |Software-Created Instruments >> One Channel Simple Scope), E8.3, P8.1; |
| |Chapter 9 (skip section 9.2.4): E9.1, P9.2, P9.3; |
| |ALL – Chapter 10; |
| |PVI 5; |
|Feb 4 (Due 2/15) |LWL – Chapter 10 (sections 10.2 and 10.3 – see handout): E10.1, P10.1; |
| |ALL – Chapter 11; |
| |PVI 6; |
|Feb 11 (Due 2/22) |LWL – Chapter 11(G Math toolkit handout): E11.1, E11.2, E11.3; |
| |ALL – Chapters 8 & 9; |
| |PVI 7; |
|Feb 18 (Due 3/1) |Labview challenge project |
|PYTHON SECTION | |
|Feb 25 | |
|March 4 | |
|March 11 |SPRING BREAK |
|March 18 | |
|March 25 | |
|April 1 | |
|April 8 | |
|April 15 |Python challenge project |
|April 22 | |
PROJECT VI (PVI) DESCRIPTIONS
PVI-1 Random Number Generator:
Use random number generator to plot a series of random numbers on a chart.
PVI-2: Signal Generator: See file “Signal_Generator.doc”
PVI-3: Temperature Sensor:
Use the DAQ-IO card to monitor the temperature of the temperature sensor. Your VI panel should include the following items and capabilities:
-RED, YELLOW, and GREEN alarm lights for temperature above, below, and within a specified range, respectively.
-Inputs to allow you to change the upper and lower limits of the temperature range.
-A chart showing the temperature as a function of time.
-An input to change the rate at which the temperature is sampled.
PVI-4: See file “PVI4_rcfilters”
PVI-5: Sound input and analysis.
Create a VI that will accomplish the following:
-input sound from the microphone
-plot the waveform on a graph
-FFT the waveform and plot the result
-bandpass filter the waveform and display the filtered result
Your VI should have inputs to set the frequency range for the FFT display, and to control the number of points and points-per-second for the acquisition of the waveform.
Your sound sources are tuning forks. Try measuring the waveform along the axis of the tuning fork. Can you see the harmonics? How sinusoidal is the waveform?
PVI-6: IR Pulse Transceiver
The two workstations will be used in two teams for this project.
You will create a Transmitter VI and a Receiver VI, to transmit an 8-bit binary code sequence from one station to the other. The transmitter will encode the binary number into pulses for transmission by an infra-red LED. The receiver will receive the optical signal, remove noise, and process the signal to decode the binary number.
The “0” and “1” signals will be encoded as two different frequencies of a pulse train. This is called frequency modulation, or FM. You can use the FFT tool from PVI-5 to figure out whether a “0” or “1” has been transmitted.
PVI-7: Geiger Counter
Create a VI to display the number of counts per minute from a Geiger-Muller tube. Include both an “analog” display (bar, needle, or something else that you like), and a “digital” display (numeric). Include controls to set the time period over which the data is averaged, before it is displayed (such as averaging over 1, 10, or 100 seconds).
Modify your VI so that you can measure the count-rate of a Cs-137 source as a function of distance from the GM tube, and plot the results of count-rate vs. distance. Fit the result with a smooth curve.
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